DOC: fix typo in amplitude-analysis.ipynb #808

Job	Run time
style / Determine skipped pre-commit hooks	10s
pytest / Determine job matrix	5s
doc / nb / Execute and build documentation	4m 47s
doc / linkcheck / Check external links	2m 47s
pytest / Run unit tests (3.10, ubuntu-22.04)	3m 9s
pytest / Run unit tests (3.11, ubuntu-22.04)	3m 32s
pytest / Run unit tests (3.8, ubuntu-22.04)	3m 16s
pytest / Run unit tests (3.9, ubuntu-22.04, tensorwaves)	3m 39s
pytest / Run unit tests (3.9, macos-12)	6m 15s
style / Run taplo through pre-commit	27s
style / Run local pre-commit hooks	3m 10s
style / Push changes	0s
doc / Upload to GitHub Pages	0s
	31m 17s

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